Furnace



c. A. SIEGEL March 30,1926.

FURNACE 2 Sheets-Sheet vl Filed August 2, 1921 March 30 926.

C. A. SIEGEL zummcs Filed August 2, 1921 2 Sheets-Sheet 2 m 1 @3 Q @QQQQQQ 4%19)? Fez ra Patented Mar. 39, 1926.

UNITED, STATES TE TOF ICE CHESTER A. SIEGEL, or ARLINGTON, NEW JERSEY, AssIGNon' 130 AMERICAN ARCH a I COMPANY,Aconr'oBA'rIoN OF DELAWARE; I a

FURNACE.

7 Application filed August 2, 1921. Serial No.'489, 3 28 1'0 aZ-Z 1117mm it may concern:

Be it known that I, CHESTER A. SIEGEL, a citizen of the United States, residing at Arlington, in the county of Hudson and 5 State of New Jersey, have invented certain new and useful Improvements in Furnaces,

of which the following is a specification.

My invention relates to furnaces and fire pans fired with fuel in gaseous, vaporous or suspended condition, and is of especial advantage for oil burning locomotives. I aim to secure thorough and intimate intermixture of fuel and air forcombustion, and to improve the combustion and economy of fuel. I also aim to provide for high fuelburning capacity in a furnace capable of efficient operation at less than its fullest capacity, so as to secure flexibility of operation sufficient to meet varied service conditions satisfactorily. How these and other advantages can be realized through my invention will appear from my description hereinafter of the best embodiment of the invention at present known to me. In the drawings, Fig. 1 shows a vertical longitudinal mid-section through the fire box and fire pan or flash panof an oil fired locomotive boiler furnace embodying my invention. p v Fig. 2 shows a cross-section taken as inclicated by the line 2-2 in'Fig. 1;

The locomotive fire box A shown in Fig.

1 is of a familiar type. It is provided with i the usual sectional fire arch Bextending rearward and upward from the lower por-' tion of the tube sheet 6, and consistingof fire bricks 7 supported on fore and aft 'water circulation tubes 8 connected between the tube sheet 6 and the rear wall 9 ofthe fire box. Preferably, the arch B has a number of draft openings 10 therethrough. At the bottom of the fire box A is a fire pan structure C which may be briefly described as comprising a metal floor sheet or shelf 12 extending inward from the bottom of the mud ring 18, and a metal trough D withsloping sides 15, 15 extending fore and aft within and below the inner edges of the shelf 12. v

The trough or fire pan D is here shown of greater length than usual, so thatthe shelf .12 does not extend across its forward end and is of very limited size at its rear end. As shown, also, the trough has vertical walls 16 with refractory fire brick linings or fiash walls 17 at both ends, and both the flash walls 17 extend some distance upward into the firebox A, above the top of what is strictly the fire pan D. The sloping sides 15 and the flat, horizontal bottom or floor. 18 of ings 19 such as are usual in locomotive flash pans,-as has also the shelf 12. In thefloor 18, toward either. end of the fire pan D are hoppers 20 of usual character. The rear Walls 21 of these hoppers 20 are hinged at their upper edges, at 22 so as to swing rearward and upward.

The fire pan D is divided into fore and aft compartments 24: and 25 by an intervening refractory structure 13- which has the form of a transverse inverted trough covered with fire brick. In this hollow septum Eare burners 27, 27, directed fore and aft into the compartments 2A and 25, toward the flash walls 17, through openings 29 in the opposite walls of said septum,and taking air for combustion therethrough. As shown, the sides 15 of the fire pa n'D are interrupted at the trough structure E, so as to allow free inflow of air thereinto laterally as well as from beneath. The transverse refractory arch 30 which forms the top or roof of the structure E protectsthe subjacentburners the fire pan D have refractory fire brick lin I p 27 from the intense heat of combustion;

above,as, indeed, does also the continual influx of cold air through the refractory structure E at the openings 29.- Preferably, the supply andv distribution of fuel to the burners 27,, 27 is controlled by a three-way valve 31, so'thateither' one or both' 'of the burners can be "operated andregulated or cut out at pleasure. The common supply pipe 32 may also be equipped with the usual regulating valves, 'etc., for oil burners of this sort. T

In operation, thefuel and air jets, blasts, or streams from the burners 27, 27 are directed fore and aft against the flash walls 17 at the ends of the compartments 24 and 25, which arrest, baffle, and mix up sthese streams, and deflect them upward and retrovert them back toward one another above B, in the upper portion or top of the com-,

bustion chamber defined by said arch. The stream from the forward directed burner 27 is deflected upward and retroverted rear- Ward by the forward flash'wall 17 andpa'sses rearward beneath the arch B and then upward to the rearof said arch; while the stream from the rearward directed burner 27 is deflected upwad and'retrovert-ed forward by the rear flash wall 17, and passes forward beneath the arch B, as well as up- When the forward directed burner 27 isoperated alone, the flow of its stream is substantially that described above -except, that it is not deflected, agitated, and mixed up with the stream from the rearward directed burner, and hence is somewhat more regular in its course. In this case, however, the draft through the rearward opening 29 causes eddies which help .to agitate the fuel stream and mix it thoroughly, as well as to admix additional air with it. 7 The action with the rearward directed burner is somewhat similar in this regard; but the influences aifecting'the stream are more various so that greater agitation, eddying, and admixture of air occur. 7 v

What I claim is 1. In a locomotive furnace, thecombina tion of a fire arch eXt-ending'from one end of the fire box toward the other; a fire pan for said fire box with a flash wall at either end thereof; and burners in said fire pan directed fore and aft toward said flash walls, so that their fuel streams shall be retroverted by said flash walls and meet in the upper portion of the combustion chamber defined by said fire arch. I r a 2.- In a locomotive furnace, the combination of a fire arch extending rearward from theflue sheet; a fire pan for the fire box with a. flash wall at either end thereof, burners in said fire pan directed fore and aft toward said flash -walls, so that their fuel 7 streams shall be retrovertedby the latter and meet in the top of the combustion chamber beneath said arch; and a refractory strucheat of combustion in said combustion chamber. I I

3. In a locomotive furnace, the combination of a fire arch extending rearward from the flue sheet and having draft openings "therethrough; a fire pan for the fire box with 4. In a locomotive furnace, the combina-- tion of a fire arch extending rearward from the flue sheet; a tire pan for the fire box comprising fore and aft compartments, flash walls at then-opposite ends and a refractory structure separating. them, and burners in said refractory structure'directed fore and aft into said compartments, and taking air from combustion through openings in said structure directed fore and aft into said compartments, so that the fuel streams may meet after deflection upward at the ends of said compartments.

5. In a locomotive furnace, the combina tion of a fire arch extending rearward from I the flue sheet; a fire pan for the fire box burners directed fore and aft into said compartments. V V

7; A fire pan fora locomotive fire box divided into fore and aft, compartments by a transverse inverted refractory trough structure with openings through its opposite walls for burners directed fore and'aft into said compartments. p

In testimony whereof, I have hereunto signed my name.

CHESTER A. smear. 

